Velasco Andres, Ryu Yu Kyoung, Hamada Assia, de Andrés Alicia, Calle Fernando, Martinez Javier
Instituto de Sistemas Optoelectrónicos y Microtecnología, Universidad Politécnica de Madrid, Av. Complutense 30, 28040 Madrid, Spain.
Departamento de Ingeniería Electrónica, Escuela Técnica Superior de Ingenieros de Telecomunicación, Universidad Politécnica de Madrid, Av. Complutense 30, 28040 Madrid, Spain.
Nanomaterials (Basel). 2023 Feb 21;13(5):788. doi: 10.3390/nano13050788.
Laser-induced graphene (LIG) is a graphenic material synthesized from a polymeric substrate through point-by-point laser pyrolysis. It is a fast and cost-effective technique, and it is ideal for flexible electronics and energy storage devices, such as supercapacitors. However, the miniaturization of the thicknesses of the devices, which is important for these applications, has still not been fully explored. Therefore, this work presents an optimized set of laser conditions to fabricate high-quality LIG microsupercapacitors (MSC) from 60 µm thick polyimide substrates. This is achieved by correlating their structural morphology, material quality, and electrochemical performance. The fabricated devices show a high capacitance of 22.2 mF/cm at 0.05 mA/cm, as well as energy and power densities comparable to those of similar devices that are hybridized with pseudocapacitive elements. The performed structural characterization confirms that the LIG material is composed of high-quality multilayer graphene nanoflakes with good structural continuity and an optimal porosity.
激光诱导石墨烯（LIG）是一种通过逐点激光热解从聚合物基底合成的石墨烯材料。这是一种快速且经济高效的技术，对于诸如超级电容器等柔性电子器件和能量存储设备而言非常理想。然而，对于这些应用很重要的器件厚度的小型化仍未得到充分探索。因此，这项工作提出了一组优化的激光条件，以从60微米厚的聚酰亚胺基底制造高质量的LIG微型超级电容器（MSC）。这是通过关联其结构形态、材料质量和电化学性能来实现的。所制造的器件在0.05 mA/cm时显示出22.2 mF/cm的高电容，以及与那些与赝电容元件混合的类似器件相当的能量和功率密度。所进行的结构表征证实，LIG材料由具有良好结构连续性和最佳孔隙率的高质量多层石墨烯纳米片组成。
